Hettie Bagshot and Tilly Jenkins are hired to investigate a spate of mysterious deaths at Mr Whisker's Academy for Wayward Cats. Before Tilly even opens her notebook, the hockey mistress is brutally murdered on the playing field. Faced with an increasing body count, our feline detectives sharpen their claws and set out to catch a serial killer. Did Pomadora Moseley really murder her family on the rollercoaster at Butlins? Is Clara Toddlebury's Country Dance Class under threat? And why does Mr Whisker lock himself in his headmaster's study? Join Hettie and Tilly as they chalk up another case, revealing a school full of scandal, a dormitory of death and the latest Butters' pie filling.